Mutagen vs Carcinogen Mutagen and carcinogen are two terms that have a lot in common. There is a potential that a single substance could be both of them at the same time and be only one of the two, as well.
A curb bit is a type of bit used for riding horses that uses lever action. It includes the pelham bit and the Weymouth curb along with the traditional curb bit used mainly by Western riders. Kimblewicks or Kimberwickes are modified curb bits, and a curb bit is used in a double bridle along with a bradoon.
It also brings pressure up into the chin groove and âtwistsâ the headstall down, causing downward pressure on the horseâs poll. A bit with no curb strap gives no leverage to the reins and no pressure to the chin groove.When the rider picks up the reins, the horse is alerted to impending action (signal). When the rider pulls back on the reins, the bit moves.t also brings pressure up into the chin groove and âtwistsâ the headstall down, causing downward pressure on the horseâs poll. A bit with no curb strap gives no leverage to the reins and no pressure to the chin groove.